Gardner Denver ELECTRA-SCREW EBE DH-15 HP, Operating And Service Manual

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13–8–609 Page 37
SECTION 9
TROUBLE SHOOTING
SYMPTOM POSSIBLE CAUSE REMEDY
Compressor fails to start. 1. Wrong lead connections. 1. Change leads.
2. Blown fuses in control 2. Replace fuse.
box.
3. Motor starter overload 3. Reset and investigate
heaters tripped. cause of overload.
4. Pressure in reservoir. 4. Inspect blowdown valve.
5. Read error message on 5. Replace switch.
control panel. See Section 4.
Compressor starts but 1. High discharge temperature. 1. See “High Discharge
stops after a short time. Air Temperature,” this
section, page 38.
2. High discharge 2. Replace switch.
temperature switch
malfunction.
3. Blown fuse in starter/ 3. Replace fuse
control box. (investigate if fuses
continue to blow).
4. Motor starter overload 4. Reset and investigate
heaters trip. cause of overload.
Compressor does not 1. Improperly adjusted 1. Refer to Section 4, page
unload (or load). control. 19, and adjust control.
2. Air leak in control 2. Determine source of
lines. leak and correct.
3. Restricted control line. 3. Clean control lines.
4. Subtractive pilot or blow– 4. Repair, clean or replace
down valve malfunction. valve.
Compressor cycles from 1. Insufficient receiver capacity. 1. Increase receiver size.
load to unload excessively.
2. Restriction in control tubing. 2. Inspect and clean control
tubing.
3. Subtractive pilot setting 3. Adjust the valve. See
too high. Section 4, page 22.
Compressor is low on 1. Restricted air filter. 1. Clean or replace filter.
delivery and pressure.
2. Sticking inlet valve. 2. Inspect and clean inlet
valve.